I have a DMA2100 connected over the wireless N network via a Netgear WNDR3300 dual-band router. As you can see by the chart below, I have a fairly sustained high-quality connection. I have no problem watching HD content streaming over the network, no lags and manually commercial skipping (as well as auto-skipping) is instantaneous. I can also watch live HD programming without issue.

I'm trying to figure out why the network appears to have regular signal dropouts.  I guess I'm not really complaining since the performace seems to be there, but if there is something else going on, I'd like to correct it.

Any ideas why this could be happening?

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Vista Ultimate 32-bit SP1
Asus M2A-VM HDMI
AMD Athlon 64 X2 5200+ (65W)
500GB SATA HDD; 4GB (2x2GB) DDR2 800 SDRAM
nMEDIAPC HTPC 500BAR
Samsung 20X DVD±R
HD HomeRun; nVidia DualTV
Linksys DMA2100; WRT600N Router
ZALMAN CNPS 8700 NT